Question

When the velocity is constant, can the average velocity over any time interval differ from instantaneous velocity at any instant ? If so, give an example; if not, explain why.

Answer 1

No. Here velocity is constant. 

∴ Average velocity over any time interval is same and the instantaneous velocity at any instant is same. 

Ex : Let us consider a car moves on a straight road with constant velocity say 10 m/s. 

1) Now let the distance covered (AB) by the car in 1 s = 10 m.

2) Distance covered in 2s (AC) = 20 m. 

Average velocity from A to C is \(\frac{20m}{2s}\) = 10 m/s. 

3) Instantaneous velocity at A or B or C at any point = 10 m/s.